This is a brief excerpt from the CV of Mr. J. Kenneth Moore, Sr. Some months ago there was a discusion on this list regarding the "population count" opcodes of several CDC mainframes in the 70ies. It was uncovered that this opcode was for plaintext detection. Now I am wondering whether a project named "CROCKER" and mentioned in Mr. Moore's CV was related to the implementation of population count opcodes by CDC. Said particular opcodes appeared to be quite useless outside code-breaking business. Regards Axel H Horns --** http://jya.com/nsa-crocker.htm http://www.ariva.com/jkm1/jkm-res.htm ------------------------------- CUT --------------------------------- [...] Conducted an in-depth analysis of the flow of data though the NSA computer complex from the point of intercept to the production of reports. This was the world's largest computer installation with over twenty high-speed mainframes from a variety of vendors. Interviewed product users, schedulers, systems analysts and computer operations staff. Analyzed computer utilization data and co-authored a technical report with findings and recommended specific areas for improvement. Hardware: IBM S/360, Univac 1100, Burroughs B6600, CDC Cyber, CDC 1604, GE 635, IBM 7074, IBM 1401, Digital PDP-10. Responsible for integrating and testing a memory control unit for the CROCKER Processing System. The CROCKER system was designed to improve the processing throughput of decryption software by loading large amounts of encrypted intercept into parallel banks of shared high-speed mass memory and processing the data with multiple special purpose parallel processors. The system was integrated with an IBM 360/65 mainframe, three special function processors and eight memory banks of high-speed core memory. A fast switching unit implemented with TTL LSI chips on wire wrap boards controlled access to the memory. Integrated boards in rack-mounted back plane. [...] ------------------------------- CUT ---------------------------------
